Sole-pressing machine.



W. C. STEWART.

SOLE PRESS ING MACHINE.

APPLICATION FILED FEB. 26. 1914.

1,189,402. Patented l uly 4,1916.

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mines-s e8 filvenivr Z Z 7/7 & V 97 W. C. STEWART. sou: PRESSING MACHINE. APPLICATION FILED FEB. 26, 1914.

1 .1 89,402. Patented July 4, 1916.

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Witnesses Jaw/(P W. C. STEWART.

SOLE PRESSING MACHINE.

APPLICATION man FEB. 26. 1914.

1,189,402. Patented July 4,1916.

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WILLIAM C. STEWART, OF SWAMPSCOTT, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

SOLE-PRESSIN G MACHINE.

Specification of Letters Patent.

Patented July 4, 1916.

Application filed February 26, 1914. Serial No. 821,269.

17 '0 all whom it may concern Be it known that I, WILLIAM C. STEWART, a subject of the King of Great Britain, residing at Swampscott, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Sole-Pressing Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to sole pressing machines and more particularly to sole laying or sole leveling machines of the direct pres sure type in which the shoe sole is subjected to pressure between a suitably shaped form and a jack on which the shoe is supported.

The invention is intended primarily as an improvement on the machine shown and described in United States patent to Mayo, No. 881,478, March 10, 1908 and its object is to provide novel and improved mechanism by which the operator may quickly and conveniently regulate the pressure which is applied to the sole in a machine of this type.

-To this end the invention comprises the features of construction and combination of parts hereinafter described and referred to in the claims.

The invention will be readily understood from an inspection of the accompanying drawings and the following detailed de' scription of the mechanism illustrated therein.

In the drawings: Figure 1 is a side elevation showing so much of a sole leveling machine as is necessary to illustrate the application of the present invention thereto; Fig. 2 is a front elevation of the form carrying head; Fig. 3 is a plan parts overlying the head being omitted; and Fig. 4 is a vertical sectional view on line 4:4=, Fig. 2.

one of which is indicated at 2, and with tw cooperating sole pressing forms 4. Eac 9 jack is constructed to receive a shoe support-i= ing last or follower 6 and is mounted to re-l ciprocate in a horizontal guideway formedlt in the upper portion of the table 8 which islif. mounted to reciprocate vertically in guide-I ways on the main frame of the machine.

Each jack is reciprocated on the table 8 to bring it from a position of presentation at the front of the machine to a position directly beneath its cooperating form and re turn it to its position of presentation after the pressing operation by means of a lever 10 connected at its upper end to the jack by a link 12. The lever is oscillated by means of a link 14 provided with a slot 16in its forward end adapted to engage a stud on 'the lever and pivotally connected at its rear end to a lever 18 which is provided with a cam roll engaging a cam on the cam shaft 20. The requisite amount of pressure to level the sole of a shoe supported upon a jack is produced by the upward movement of the table 8 when the jack is in position beneath its cooperating form. The table 8 is'actuated at the proper times during the operation of the machine by mechanism comprising a toggle 22 suitably connected to the cam shaft 20. This mechanism thus has a constant throw.

The forms 4: are mounted in any suitable manner upon the lower end of form carriers 24. mounted in a vertically movable crosshead 26 and supported against the upward pressure of the acks by heavy pressure springs 28 which are interposed between the form carriers and the head. The form carriers are held in position inthe head by bolts 30 which are secured to the form carriers and are provided at their upper ends with nuts 32 engaging the upper side of the head. The crosshead 26 is permitted to descend to seat the form upon the jack prior to the vertical movement of the jack and is raised at the completion of the pressing operation view of the head, the airanged to engage the periphery of a cam mounted on the cam shaft 20.

In the machine of the Mayo patent referred to the crosshead is locked in position The machine shown in the drawings is fii after the form has beeen seated upon they provided with two shoe supporting-jacke shoe sole by looking or stop cams so that the pressure spring is compressed to a uniform extent without regard to the thickness of .the sole or the height of the last, thus securing a uniform pressure upon each sole. This is due to'the uniform throw of the pressure producing mechanism which acts independently of the form seating means. In order to regulate the pressure in this referred to.

machine it is necessary to vary the initial tension of the pressure spring by adjustment of the nut corresponding to the nut 32 which retains the form carrier in the crosshead. Such adjustment is not only inconvenient, but requires that the form and cooperating last he in position of pressure in order that the adjustment may be made. In embodying the present invention in the machine of the Mayo patent means is provided for regulating the pressure which is applied to the shoe sole by varying the distance through which the pressure spring is compressed by the upward movement of the jack in applying the pressure to the sole. In its preferred form this means comprises a controller'cam connected with the locking or stop cams which determine the upward movement of the crosshead and cooperating with a vertically adjustable surface carried by the crosshead and mounted to yield to allow the crosshead to move vertically until arrested by engagement with the stop cams.

In the construction shown the stop cams for determining the upward movement of the crosshead 26 are indicated at 40 and are mounted upon a rock shaft 12. The rock shaft is operated to swing the stop cams out of position above the crosshead through a lever 44 which is operated by a cam on the cam shaft 20 and is connected with the rock shaft through a link. 46. The rock shaft is rocked to swing the stop cams into position above the cross-head by a spring (not shown) as in the Mayo patent above A controller cam 48 is secured to the stop cams and has a cam face parallel to the faces of the stop cams. The con troller cam is arranged to engage the upper end of a plunger 50 which is mounted to slide vertically in a carrier slide 52. The plunger 50 is held normally in fixed position on the carrier slide by a spring 54 which holds a stop lug 56 on the plunger in engagement with a stop 58 on the carrier slide. The lower end of the spring 54 is supported upon a disk 60 which may be adjusted by a screw 62 to vary the tension of the spring. The carrier slide is mounted for vertical adjustment in ways on the front side of the crosshead and may be adjusted vertically on the crosshead by a nut 64 engaging a screw threaded rod 68 which is secured in an arm 70 projecting from the carrier slide. The nut is held between lugs 66 projecting from the crosshead, and serves to hold the carrier slide in adjusted position on the crosshead. The nut 64 is provided with a spiral pinion 72 engaged by a similar pinion 74 on the rear end of a shaft 76, the front end of which carries a hand wheel 7 8 through which the operator may conveniently vary the vertical position of the carrier slide on the crosshead and thus adjust the plunger vertically. WM

lVhen the pressure regulating plunger or slide 50 is adjusted vertically into position to cooperate with the controller cam 48 the cam will engage the slide as the cams 40 and 48 swing downwardly and will arrest the movement of the cams 40 and determine their position with relation to the cross-head the spring 54 being strong enough to prevent any yielding of the slide 50 at this time. The stop cams 40 will be thus positioned above the crosshead by the engagement of the controller cam with the slide or plunger after the form has been seated upon the shoe sole. W hen the mechanism for actuating the jack to apply pressure to the sole raises the jack, the form and crosshead will move upward idly until the upward movement of the crosshead is arrested by the stop cams l0, after which the further upward movement of the jack will compress the pressure spring 28 and apply a pressure to the sole. During the upward movement of the jack the plunger 50 will yield verti cally to allow the crosshead to move with the jack until its movement is arrested by the stop cam. The pressure applied to the sole will depend upon the extent to which the pressure spring is compressed and this may be regulated by vertical adjustment of the pressure regulating plunger 50 on the crosshead. Upward adjustment of the plunger will increase the lost motion between the crosshead and stop cams, thus reducing the spring compressing movement of the jack and form and consequently reducing the pressure applied to the sole. Downward adjust-ment of the pressure regulating plunger will have the opposite effect and will increase the pressure applied to the sole, the greatest pressure being secured when the stop cams are allowed to engage the crosshead and lock it in the position into which it is moved in seating the form on the sole. 8

An indicating device may be provided for indicating the adjustment corresponding to various pressures. As shown an indicating finger 80 is pivoted to the crosshead and is provided at one end with a slot engaged by a pin 82 on the plunger carrier slide 52. The other end of the indicator finger cooperates with a scale 84 upon which the pressure in tons corresponding to any given adjustment is indicated.

By the above mechanism the operator is enabled to quickly and conveniently adjust the pressure regulating mechanism to secure the pressure best suited to the character of work being done and is enabled to quickly and conveniently change the adjustment whenever the character of the work is changed.

While it is preferred to employ the specific construction and arrangement shown and described in embodying the invention in the machine of the Mayo patent, it will be understood that this construction and arrangement is not essential to the broader features of the invention and may be varied or modified as found desirable or best suited to the construction of the machine in which the invention is to be embodied.

Having explained the nature and object of the invention and specifically described one form of mechanism in which it may be embodied, what is claimed is:

1. A sole pressing machine, having in combination, a shoe supporting jack, a sole pressing form, means for relatively moving the jack and form to seat the form, independently acting mechanism for relatively actuating the jack and form to apply pres sure to the shoe sole, a spring for supporting the form against pressure, and adjustable means for regulating the distance through which the spring is compressed by the actuating mechanism.

2. A sole pressing machine, having in combination, a shoe supporting jack, a sole pressing form, a head, a spring interposed between the head and form, means for relatively moving the head and jack to seat the form, independently acting mechanism for relatively actuating the jack and head to apply pressure to the shoe sole, and adjustable means for regulating movement between the head and form produced by the actuating mechanism,

3. A sole pressing machine, having in combination, a shoe supporting jack, a form, a spring supporting the form against pressure, means for moving the form to seat it on the shoe, mechanism for actuating the jack to apply pressure to the shoe sole, and adjustable means for regulating the distance through which the spring is compressed by the actuating mechanism.

4. A sole pressing machine, having in combination, a shoe supporting jack, a head, a form, a spring between the form and head, means for moving the head vertically to seat the form, mechanism for actuating the jack to apply pressure to the shoe sole, :1 stop for limiting the upward movement of the head, and adjustable means for position ing the stop in accordance with the position of the head when the form is seated.

5. A sole pressing machine, having in combination, a shoe supporting jack, a head,

a form, a spring between the form and head, means for moving the head vertically to seat the form, mechanism for actuating therewith and arranged to engage a con troller stop on the head, one of said stops being adjustable and the controller stops being relatively yielding.

6. A sole pressing machine, having in combination, a shoe supporting jack, a sole pressing form, a head, a spring interposed between the form and head, means for moving the head vertically to seat the form, mechanism for actuating the jack to press the sole, a stop cam for determining the upward movement of the head, a controller cam connected therewith, and an adjustable cooperating member on the head.

7. A sole pressing machine, having in combination, a shoe supporting ack, a sole pressing form, a head, a spring interposed between the form and head, means for moving the head vertically to seat the form, mechanism for actuating the jack to press the sole, :1 stop cam for determining the upward movement of the head, a controller cam connected therewith, and a vertically adjustable spring supported slide on the head arranged to be engaged by the controller cam.

8. A sole pressing machine, having, in combination, a shoe supporting jack, a sole pressing form, a head carrying one of said parts, a spring interposed between the head and the part carried thereby, means for relatively moving the head and the other part to seat the form, independently acting pressure producing mechanism having a constant throw, and adjustable means for regulating movement between the head and part carried thereby produced by the pressure mechanism.

9. A sole pressing machine, having, in combination, a shoe supporting jack, a sole pressing form, a head, a spring interposed between the head and the form, means for relatively moving the head and jack to seat the form, independently acting mechanism having a constant throw for relatively actuating the jack and head to apply pressure to the shoe sole, and adjustable means for regulating movement between the head and form produced by the actuating mechanism.

WILLIAM C. STEWART.

Witnesses:

CARL A. NEWHALL, HAROLD E. KENYON.

Copies of this patent may be obtained for five cents each. by addressing the Commissioner 0! Patents, Washington, D. G. 

